<h3 mat-dialog-title>导入至“无票种”</h3>

<mat-dialog-content>

请先点击<button mat-button (click)="dlTemple()">下载</button>导入模板，模板因活动而异。


<input   type="file" accept="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" 
placeholder="导入"  (change)="change($event)" required>


</mat-dialog-content>

<mat-dialog-actions>
    <button mat-button mat-dialog-close>关闭</button>
    <span class="fill-remaining-space"></span>
    <button mat-raised-button color="primary" (click)="import()" [disabled]="!file">确认</button>
</mat-dialog-actions>